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Corbin Haley
Mathematics
3 April, 20:15
Twice the sum of a number and 7 is equal to 3
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Killian Mcneil
3 April, 20:41
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Let n = the number.
Twice the sum of a number and 7 = 3 would be 2 (n+7) = 3. Divide by 2 on both sides to get n+7 = 3/2. Then subtract 7 from both sides to isolate the variable n.
n = 3/2 - 7. N = - 5.5 or - 11/2
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